Gundam Wing as a whole was ok, but:
-1 when Heero survives self destructing Wing Gundam
-1 when Trowa survives the destruction of Vayeate
-1 when Lady Une survives Wing Gundam's near-vaporization
-1 for when Treize ACTUALLY dies
-1 when Zechs survived the destruction of Epyon
-1 when Heero survives the destruction of Wing Gundam Zero Custom
As a whole: 5/10 for me.
Just way too convenient for all those characters to live. I'm sure there are some I missed, but I can't remember.